Protective automobile bumper
By designing a graded energy-absorbing car bumper, which uses mounting rods and energy-absorbing components to absorb energy in stages during a collision, the problem of existing bumpers being unable to absorb energy in stages is solved. This achieves differentiated protection for different collision intensities, improving occupant safety and vehicle body protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI DONGSHENG AUTO PARTS CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-04-24
AI Technical Summary
Existing car bumpers cannot effectively absorb energy in stages during a collision, causing the impact force to be directly transmitted to the vehicle body, resulting in deformation of the passenger compartment or injury to the occupants, and it is difficult to provide differentiated protection for different collision intensities.
A protective car bumper was designed, which moves within a mounting slot via a mounting rod and utilizes an energy-absorbing component to absorb impact force in stages. This component includes multiple energy-absorbing columns and blocks distributed at equal intervals, which cut and absorb energy step by step according to the collision intensity to achieve multi-level energy absorption.
It effectively reduces the intensity of impact force transmitted to the vehicle body, provides more reliable occupant protection, reduces the risk of vehicle body deformation and occupant injury, and provides differentiated protection under different collision intensities.
Smart Images
Figure CN224159251U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive bumper technology, specifically a protective automotive bumper. Background Technology
[0002] A car bumper is a device that absorbs and mitigates external impact forces when a vehicle or driver is involved in a collision, thus protecting the driver and the vehicle. With the development of the social economy and the automotive industry, the density of vehicles on the road is increasing, and the role of the bumper is becoming more and more prominent.
[0003] The front and rear bumpers of a car not only serve a decorative function, but more importantly, they are safety devices that absorb and buffer external impacts, protect the car body and the safety of its occupants, and are designed to achieve harmony and unity with the car's styling while also being lightweight.
[0004] Most current bumpers are made of steel. When a collision occurs, the bumper provides energy absorption and cushioning. However, due to the rigid connection between the bumper and the car body and its high rigidity, the rigid connection cannot buffer the collision energy, which can easily lead to the impact force being directly transmitted to the car body, causing deformation of the passenger compartment or injury to the occupants. When a car is involved in a collision, the impact force generated by the collision varies due to the different speeds of the vehicle. Existing bumper energy absorption components are difficult to achieve graded energy absorption and cannot provide differentiated protection for different collision intensities (such as low speed, medium speed, and high speed). Utility Model Content
[0005] To address the aforementioned issues, this application provides a protective car bumper.
[0006] To achieve the above objectives, this application provides the following technical solution: a protective car bumper, including a bumper body and a mounting mechanism for mounting the bumper body onto a car body. The mounting mechanism includes a mounting rod disposed on the bumper body, a mounting arm movably sleeved on the end of the mounting rod through a mounting groove at its end, and an energy-absorbing component disposed in the mounting groove. When the bumper body is impacted, the bumper body drives the mounting rod to move within the mounting groove, and the energy-absorbing component performs graded energy absorption of the impact force.
[0007] Preferably, a mounting block is provided at the end of the mounting arm away from the mounting rod, and the mounting block is mounted on the vehicle body through a mounting hole opened at the end.
[0008] Preferably, the energy-absorbing component includes multiple energy-absorbing columns fixedly disposed on the inner wall of the mounting groove. The multiple energy-absorbing columns are equally spaced along the length of the mounting arm, and the size of the multiple energy-absorbing columns gradually increases from the mounting rod toward the mounting arm. When the bumper body is impacted, the mounting rod moves in the mounting groove to perform graded cutting and energy absorption on the multiple energy-absorbing columns.
[0009] Preferably, the energy-absorbing component includes three stacked energy-absorbing blocks inserted into the mounting groove, with the energy absorption intensity of the three energy-absorbing blocks gradually increasing from the mounting rod toward the mounting arm.
[0010] Preferably, the mounting arm consists of a first assembly arm, a second assembly arm, and a positioning member that fixes the first assembly arm and the second assembly arm together. When the first assembly arm and the second assembly arm are assembled into a mounting arm, mounting grooves are formed on opposite sides of the first assembly arm and the second assembly arm.
[0011] Preferably, the positioning component includes a splicing strip disposed on the side of the first assembly arm along the length direction of the first assembly arm and a positioning ring, and a splicing groove matching the splicing strip is provided on the side of the second assembly arm; the mounting block is composed of a first assembly block fixedly disposed at the bottom of the first assembly arm and a second assembly block fixedly disposed at the bottom of the second assembly arm, and the positioning groove opened on the top of the first assembly block and the second assembly block after splicing matches the positioning ring.
[0012] The beneficial effects of this utility model are as follows: When a car is involved in a collision, the impact force on the bumper body is transmitted to the vehicle body through the energy absorption component. For vehicles that are involved in collisions of different degrees, the energy absorption component absorbs the impact energy of the collision in stages, effectively reducing the intensity of the impact force transmitted to the vehicle body and providing more reliable protection for the occupants. Attached Figure Description
[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0014] Figure 1 This is a simplified structural diagram of the protective car bumper proposed in this utility model.
[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the energy-absorbing component of this utility model.
[0016] Figure 3 This is a schematic diagram of the energy-absorbing component structure of this utility model.
[0017] Figure 4 This is a schematic diagram of the unfolded structure of the energy-absorbing component of this utility model.
[0018] In the diagram: 1. Bumper body; 2. Mounting arm; 2A. First assembly arm; 2B. Second assembly arm; 3. Mounting rod; 4. Mounting block; 4A. First assembly block; 4B. Second assembly block; 5. Mounting hole; 6. Connecting crossbar; 7. Mounting groove; 8. Energy-absorbing column; 9. Positioning groove; 10. Positioning ring; 11. Positioning hole; 12. Splicing groove; 13. Splicing strip; 14. Energy-absorbing block; 15. Locking block; 16. Locking hole. Detailed Implementation
[0019] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the embodiments without creative effort are all within the protection scope of this utility model.
[0020] Example 1: Reference Figures 1-4 The protective car bumper shown includes a bumper body 1 and a mounting mechanism for mounting the bumper body 1 onto the car body. The mounting mechanism includes a mounting rod 3 disposed on the bumper body 1, a mounting arm 2 movably sleeved on the end of the mounting rod 3 through a mounting groove 7, and an energy-absorbing component disposed in the mounting groove 7. When the bumper body 1 is impacted, the bumper body 1 drives the mounting rod 3 to move within the mounting groove 7, and the energy-absorbing component absorbs the impact force in stages.
[0021] like Figure 1 As shown in this embodiment, in the initial state, the bumper body 1 is connected to the mounting arm 2 via the mounting rod 3. The end of the mounting rod 3 is slidably inserted into the mounting groove 7 of the mounting arm 2. The mounting arm 2 is mounted on the car body. When the car body collides, the bumper body 1 is impacted, and the impact force is transmitted to the mounting rod 3 through the bumper body 1. The end of the mounting rod 3 moves within the mounting groove 7, squeezing the energy-absorbing component. The energy-absorbing component performs graded energy absorption of the impact energy. When the car is subjected to different impact forces, it absorbs energy correspondingly for different magnitudes of impact forces, realizing multi-level energy absorption and improving the collision protection performance of the car bumper.
[0022] Mounting arm 2 has a mounting block 4 at one end away from mounting rod 3. Mounting block 4 is mounted on the vehicle body through mounting hole 5 at the end. Mounting the bumper body 1 through mounting block 4 facilitates replacement and maintenance.
[0023] The energy-absorbing component includes multiple energy-absorbing columns 8 fixedly installed on the inner wall of the mounting groove 7. The multiple energy-absorbing columns 8 are equally spaced along the length of the mounting arm 2, and the size of the multiple energy-absorbing columns 8 gradually increases from the mounting rod 3 toward the mounting arm 2. When the bumper body 1 is impacted, the mounting rod 3 moves in the mounting groove 7 to perform graded cutting and energy absorption on the multiple energy-absorbing columns 8.
[0024] like Figure 1 and Figure 2 As shown, when the bumper body 1 is subjected to an impact force, it pushes the mounting rod 3 to move within the mounting groove 7, cutting multiple energy-absorbing columns 8 that are evenly distributed within the mounting groove 7. This avoids the concentration of local stress on the one hand, and consumes the energy generated by the collision by cutting the energy-absorbing columns 8, thereby reducing the impact force transmitted to the vehicle body.
[0025] In this embodiment, the staged energy absorption process includes: under low-speed collision (5-15 km / h), the bumper body 1 is subjected to a slight impact, and the mounting rod 3 moves within the mounting groove 7, first contacting and cutting the smallest energy-absorbing column 8 (the end closest to the mounting rod 3). The small-sized energy-absorbing column 8 has a small cross-sectional area and low cutting resistance, enabling it to quickly absorb low-intensity impact energy; during the cutting process, the energy-absorbing column 8 dissipates energy through plastic deformation or fracture, reducing the impact force transmitted to the vehicle body and reducing low-speed impact injuries to the occupants. In a medium-speed collision (15-40 km / h), the impact strength of the bumper body 1 increases. The mounting rod 3 moves within the mounting groove 7, sequentially cutting the small and medium-sized energy-absorbing pillars 8. At this time, due to the large impact force on the bumper body 1, the mounting rod 3 will first quickly cut the small-sized energy-absorbing pillars 8, rapidly consuming a small portion of the impact energy, and then cut the medium-sized energy-absorbing pillars 8. Due to the increased cross-sectional area of the medium-sized energy-absorbing pillars 8, the cutting resistance is increased, absorbing more energy. Furthermore, the step-by-step cutting of the multi-stage energy-absorbing pillars 8 forms an "energy buffer ladder," delaying the time for the impact force to be transmitted to the vehicle body; reducing the stress on the vehicle body structure (such as longitudinal beams), lowering maintenance costs; and avoiding excessively high peak acceleration in the passenger compartment, reducing the risk of neck or chest injuries to occupants. In a high-speed collision (frontal collision), the bumper body 1 is subjected to a strong impact. The mounting rod 3 moves and sequentially cuts all the energy-absorbing pillars 8. At this time, all the energy-absorbing pillars 8 break, absorbing most of the energy; the bumper body 1 is severely deformed, but the passenger compartment structure remains relatively intact.
[0026] like Figure 1 As shown, the two mounting arms 2 are connected on opposite sides by a connecting crossbar 6, which ensures the stability of the overall structure when mounted on the vehicle body.
[0027] The energy absorption assembly includes three energy absorption blocks 14 stacked and inserted into the mounting groove 7. The energy absorption intensity of the three energy absorption blocks 14 gradually increases from the mounting rod 3 toward the mounting arm 2.
[0028] like Figure 4As shown, in this embodiment, three energy-absorbing blocks 14 are stacked and inserted along the axial direction of the mounting groove 7 to form a "nested" structure, ensuring that the mounting rod 3 contacts and compresses the energy-absorbing blocks 14 of different strengths in sequence during the movement. Among them, from the direction of the mounting rod 3 toward the mounting arm 2, the energy absorption intensity of the energy-absorbing block 14 gradually increases (low strength → medium strength → high strength), forming a graded structure of "soft → medium → hard".
[0029] In this embodiment, the energy-absorbing block 14 can be cylindrical, rectangular, or corrugated to increase the contact area during compression and improve energy absorption efficiency. The energy-absorbing block 14 is made of materials such as aluminum foam, honeycomb aluminum, rubber composites, or gradient strength polymers of different densities, adjusting the energy absorption intensity through material density or microstructure. The strength gradient design of the energy-absorbing block 14 allows it to automatically adjust its energy absorption strategy according to the impact intensity, preventing premature failure or excessive energy absorption of a single energy-absorbing element. The progressive compression of the multi-stage energy-absorbing blocks 14 forms an "energy buffer ladder," delaying the time it takes for the impact force to be transmitted to the vehicle body, reducing the peak acceleration of the passenger compartment, and improving the protection performance for occupants.
[0030] The mounting arm 2 consists of a first assembly arm 2A, a second assembly arm 2B, and a positioning component that fixes the first assembly arm 2A and the second assembly arm 2B together. When the first assembly arm 2A and the second assembly arm 2B are assembled into the mounting arm 2, the opposite sides of the first assembly arm 2A and the second assembly arm 2B form a mounting groove 7.
[0031] The positioning components include a splicing strip 13 disposed along the length of the first assembly arm 2A on the side of the first assembly arm 2A, and a positioning ring 10. The side of the second assembly arm 2B is provided with a splicing groove 12 that matches the splicing strip 13. The mounting block 4 is composed of a first assembly block 4A fixedly disposed at the bottom of the first assembly arm 2A and a second assembly block 4B fixedly disposed at the bottom of the second assembly arm 2B. The positioning groove 9 opened at the top after the first assembly block 4A and the second assembly block 4B are spliced matches the positioning ring 10.
[0032] like Figure 3 and Figure 4As shown, in this embodiment, the splicing strip 13 of the first assembly arm 2A is first aligned with the splicing groove 12 of the second assembly arm 2B, and then slid and spliced along the length of the mounting arm 2 to complete the initial horizontal positioning. The tight fit between the splicing strip 13 and the splicing groove 12 prevents the mounting arm 2 from shifting laterally during a collision, ensuring the normal operation of the energy-absorbing component. After the first assembly arm 2A and the second assembly arm 2B are spliced, the positioning ring 10 automatically embeds into the positioning groove 9 to achieve vertical fixation. The fit between the positioning ring 10 and the positioning groove 9 prevents the mounting arm 2 from separating longitudinally during a collision, ensuring the overall stability of the structure. Then, the energy-absorbing component (such as the energy-absorbing column 8 or the energy-absorbing block 14) is installed in the mounting groove 7. The energy-absorbing component is connected to the inner wall of the mounting groove 7 by fasteners (such as bolts, clips, etc.). The installation position of the energy-absorbing component is independent of the assembly structure of the mounting arm 2 and can be carried out independently, facilitating maintenance and replacement.
[0033] like Figure 4 As shown, in this embodiment, a locking block 15 is provided on the side of the energy-absorbing block 14, and the energy-absorbing block 14 is placed in the locking hole 16 opened in the wall of the mounting groove 7, which facilitates fixing the position of the energy-absorbing block 14 in the mounting groove 7.
[0034] like Figure 3 and Figure 4 As shown, in this embodiment, the positioning ring 10 has a positioning hole 11, and the positioning hole 11 communicates with the mounting hole 5 on the mounting block 4.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A protective car bumper, comprising a bumper body (1) and a mounting mechanism for mounting the bumper body (1) onto a car body, characterized in that, The mounting mechanism includes a mounting rod (3) mounted on the bumper body (1), a mounting arm (2) movably mounted on the end of the mounting rod (3) through a mounting groove (7) at the end, and an energy-absorbing component mounted in the mounting groove (7); When the bumper body (1) is impacted, the bumper body (1) drives the mounting rod (3) to move in the mounting groove (7), and the impact force is absorbed in stages by the energy absorption component.
2. A protective car bumper according to claim 1, characterized in that: The mounting arm (2) has a mounting block (4) at one end away from the mounting rod (3), and the mounting block (4) is mounted on the vehicle body through a mounting hole (5) at the end.
3. A protective car bumper according to claim 1, characterized in that: The energy absorption assembly includes multiple energy absorption columns (8) fixedly set on the inner wall of the mounting groove (7). The multiple energy absorption columns (8) are equally spaced along the length direction of the mounting arm (2), and the size of the multiple energy absorption columns (8) gradually increases from the mounting rod (3) toward the mounting arm (2). When the bumper body (1) is impacted, the mounting rod (3) moves in the mounting groove (7) to perform graded cutting and energy absorption on multiple energy-absorbing columns (8).
4. A protective car bumper according to claim 1, characterized in that: The energy absorption assembly includes three energy absorption blocks (14) stacked and inserted into the mounting groove (7). The energy absorption intensity of the three energy absorption blocks (14) gradually increases from the mounting rod (3) toward the mounting arm (2).
5. A protective car bumper according to claim 4, characterized in that: The mounting arm (2) consists of a first assembly arm (2A), a second assembly arm (2B), and a positioning component that fixes the first assembly arm (2A) and the second assembly arm (2B) together. When the first assembly arm (2A) and the second assembly arm (2B) are spliced together to form the mounting arm (2), the opposite sides of the first assembly arm (2A) and the second assembly arm (2B) form a mounting groove (7).
6. A protective car bumper according to claim 5, characterized in that: The positioning component includes a splicing strip (13) disposed along the length of the first assembly arm (2A) on the side of the first assembly arm (2A) and a positioning ring (10). The side of the second assembly arm (2B) is provided with a splicing groove (12) that matches the splicing strip (13). The mounting block (4) is composed of a first assembly block (4A) fixedly disposed at the bottom of the first assembly arm (2A) and a second assembly block (4B) fixedly disposed at the bottom of the second assembly arm (2B). The positioning groove (9) opened at the top of the first assembly block (4A) and the second assembly block (4B) after splicing matches the positioning ring (10).